I got him a size 6. I am picky about headsets and headphones. BTW, if the rechargeable batteries go bad you do not have to buy Sony replacements. These are rubber shoes and there is no give in them at all. Very cute sandals and light weigh, comfy, beautiful colors. Very glad purchased via Amazon, the return process was smooth and painless. Biggest draw back we noticed with this model are not comfortable as you use because your feet tend to skid inside as you wear and walk and push against front inner sole which is very frustrating. The sole of the shoe is farely solid. I am simply speechless, this product has been able to surprise me to as how good it is. I used to buy only Reef until they changed the foot bed material.